596 lines
19 KiB
C
596 lines
19 KiB
C
/*
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* Copyright (c) 2010 Mark Heath mjpeg0 @ silicontrip dot org
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* Copyright (c) 2014 Clément Bœsch
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* Copyright (c) 2014 Dave Rice @dericed
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "internal.h"
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enum FilterMode {
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FILTER_NONE = -1,
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FILTER_TOUT,
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FILTER_VREP,
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FILTER_BRNG,
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FILT_NUMB
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};
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typedef struct {
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const AVClass *class;
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int chromah; // height of chroma plane
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int chromaw; // width of chroma plane
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int hsub; // horizontal subsampling
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int vsub; // vertical subsampling
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int fs; // pixel count per frame
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int cfs; // pixel count per frame of chroma planes
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int outfilter; // FilterMode
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int filters;
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AVFrame *frame_prev;
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uint8_t rgba_color[4];
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int yuv_color[3];
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int nb_jobs;
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int *jobs_rets;
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AVFrame *frame_sat;
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AVFrame *frame_hue;
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} SignalstatsContext;
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typedef struct ThreadData {
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const AVFrame *in;
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AVFrame *out;
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} ThreadData;
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typedef struct ThreadDataHueSatMetrics {
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const AVFrame *src;
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AVFrame *dst_sat, *dst_hue;
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} ThreadDataHueSatMetrics;
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#define OFFSET(x) offsetof(SignalstatsContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption signalstats_options[] = {
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{"stat", "set statistics filters", OFFSET(filters), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "filters"},
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{"tout", "analyze pixels for temporal outliers", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_TOUT}, 0, 0, FLAGS, "filters"},
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{"vrep", "analyze video lines for vertical line repetition", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_VREP}, 0, 0, FLAGS, "filters"},
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{"brng", "analyze for pixels outside of broadcast range", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_BRNG}, 0, 0, FLAGS, "filters"},
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{"out", "set video filter", OFFSET(outfilter), AV_OPT_TYPE_INT, {.i64=FILTER_NONE}, -1, FILT_NUMB-1, FLAGS, "out"},
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{"tout", "highlight pixels that depict temporal outliers", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_TOUT}, 0, 0, FLAGS, "out"},
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{"vrep", "highlight video lines that depict vertical line repetition", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_VREP}, 0, 0, FLAGS, "out"},
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{"brng", "highlight pixels that are outside of broadcast range", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_BRNG}, 0, 0, FLAGS, "out"},
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{"c", "set highlight color", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="yellow"}, .flags=FLAGS},
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{"color", "set highlight color", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="yellow"}, .flags=FLAGS},
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{NULL}
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};
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AVFILTER_DEFINE_CLASS(signalstats);
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static av_cold int init(AVFilterContext *ctx)
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{
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uint8_t r, g, b;
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SignalstatsContext *s = ctx->priv;
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if (s->outfilter != FILTER_NONE)
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s->filters |= 1 << s->outfilter;
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r = s->rgba_color[0];
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g = s->rgba_color[1];
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b = s->rgba_color[2];
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s->yuv_color[0] = (( 66*r + 129*g + 25*b + (1<<7)) >> 8) + 16;
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s->yuv_color[1] = ((-38*r + -74*g + 112*b + (1<<7)) >> 8) + 128;
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s->yuv_color[2] = ((112*r + -94*g + -18*b + (1<<7)) >> 8) + 128;
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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SignalstatsContext *s = ctx->priv;
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av_frame_free(&s->frame_prev);
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av_frame_free(&s->frame_sat);
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av_frame_free(&s->frame_hue);
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av_freep(&s->jobs_rets);
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}
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static int query_formats(AVFilterContext *ctx)
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{
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// TODO: add more
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
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AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
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AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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if (!fmts_list)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, fmts_list);
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}
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static AVFrame *alloc_frame(enum AVPixelFormat pixfmt, int w, int h)
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{
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AVFrame *frame = av_frame_alloc();
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if (!frame)
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return NULL;
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frame->format = pixfmt;
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frame->width = w;
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frame->height = h;
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if (av_frame_get_buffer(frame, 32) < 0) {
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av_frame_free(&frame);
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return NULL;
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}
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return frame;
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}
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static int config_props(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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SignalstatsContext *s = ctx->priv;
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AVFilterLink *inlink = outlink->src->inputs[0];
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
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s->hsub = desc->log2_chroma_w;
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s->vsub = desc->log2_chroma_h;
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outlink->w = inlink->w;
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outlink->h = inlink->h;
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s->chromaw = FF_CEIL_RSHIFT(inlink->w, s->hsub);
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s->chromah = FF_CEIL_RSHIFT(inlink->h, s->vsub);
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s->fs = inlink->w * inlink->h;
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s->cfs = s->chromaw * s->chromah;
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s->nb_jobs = FFMAX(1, FFMIN(inlink->h, ctx->graph->nb_threads));
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s->jobs_rets = av_malloc_array(s->nb_jobs, sizeof(*s->jobs_rets));
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if (!s->jobs_rets)
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return AVERROR(ENOMEM);
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s->frame_sat = alloc_frame(AV_PIX_FMT_GRAY8, inlink->w, inlink->h);
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s->frame_hue = alloc_frame(AV_PIX_FMT_GRAY16, inlink->w, inlink->h);
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if (!s->frame_sat || !s->frame_hue)
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return AVERROR(ENOMEM);
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return 0;
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}
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static void burn_frame(const SignalstatsContext *s, AVFrame *f, int x, int y)
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{
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const int chromax = x >> s->hsub;
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const int chromay = y >> s->vsub;
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f->data[0][y * f->linesize[0] + x] = s->yuv_color[0];
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f->data[1][chromay * f->linesize[1] + chromax] = s->yuv_color[1];
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f->data[2][chromay * f->linesize[2] + chromax] = s->yuv_color[2];
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}
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static int filter_brng(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ThreadData *td = arg;
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const SignalstatsContext *s = ctx->priv;
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const AVFrame *in = td->in;
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AVFrame *out = td->out;
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const int w = in->width;
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const int h = in->height;
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const int slice_start = (h * jobnr ) / nb_jobs;
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const int slice_end = (h * (jobnr+1)) / nb_jobs;
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int x, y, score = 0;
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for (y = slice_start; y < slice_end; y++) {
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const int yc = y >> s->vsub;
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const uint8_t *pluma = &in->data[0][y * in->linesize[0]];
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const uint8_t *pchromau = &in->data[1][yc * in->linesize[1]];
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const uint8_t *pchromav = &in->data[2][yc * in->linesize[2]];
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for (x = 0; x < w; x++) {
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const int xc = x >> s->hsub;
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const int luma = pluma[x];
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const int chromau = pchromau[xc];
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const int chromav = pchromav[xc];
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const int filt = luma < 16 || luma > 235 ||
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chromau < 16 || chromau > 240 ||
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chromav < 16 || chromav > 240;
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score += filt;
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if (out && filt)
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burn_frame(s, out, x, y);
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}
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}
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return score;
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}
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static int filter_tout_outlier(uint8_t x, uint8_t y, uint8_t z)
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{
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return ((abs(x - y) + abs (z - y)) / 2) - abs(z - x) > 4; // make 4 configurable?
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}
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static int filter_tout(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ThreadData *td = arg;
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const SignalstatsContext *s = ctx->priv;
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const AVFrame *in = td->in;
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AVFrame *out = td->out;
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const int w = in->width;
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const int h = in->height;
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const int slice_start = (h * jobnr ) / nb_jobs;
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const int slice_end = (h * (jobnr+1)) / nb_jobs;
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const uint8_t *p = in->data[0];
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int lw = in->linesize[0];
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int x, y, score = 0, filt;
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for (y = slice_start; y < slice_end; y++) {
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if (y - 1 < 0 || y + 1 >= h)
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continue;
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// detect two pixels above and below (to eliminate interlace artefacts)
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// should check that video format is infact interlaced.
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#define FILTER(i, j) \
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filter_tout_outlier(p[(y-j) * lw + x + i], \
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p[ y * lw + x + i], \
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p[(y+j) * lw + x + i])
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#define FILTER3(j) (FILTER(-1, j) && FILTER(0, j) && FILTER(1, j))
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if (y - 2 >= 0 && y + 2 < h) {
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for (x = 1; x < w - 1; x++) {
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filt = FILTER3(2) && FILTER3(1);
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score += filt;
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if (filt && out)
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burn_frame(s, out, x, y);
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}
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} else {
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for (x = 1; x < w - 1; x++) {
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filt = FILTER3(1);
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score += filt;
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if (filt && out)
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burn_frame(s, out, x, y);
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}
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}
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}
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return score;
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}
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#define VREP_START 4
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static int filter_vrep(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ThreadData *td = arg;
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const SignalstatsContext *s = ctx->priv;
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const AVFrame *in = td->in;
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AVFrame *out = td->out;
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const int w = in->width;
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const int h = in->height;
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const int slice_start = (h * jobnr ) / nb_jobs;
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const int slice_end = (h * (jobnr+1)) / nb_jobs;
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const uint8_t *p = in->data[0];
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const int lw = in->linesize[0];
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int x, y, score = 0;
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for (y = slice_start; y < slice_end; y++) {
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const int y2lw = (y - VREP_START) * lw;
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const int ylw = y * lw;
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int filt, totdiff = 0;
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if (y < VREP_START)
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continue;
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for (x = 0; x < w; x++)
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totdiff += abs(p[y2lw + x] - p[ylw + x]);
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filt = totdiff < w;
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score += filt;
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if (filt && out)
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for (x = 0; x < w; x++)
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burn_frame(s, out, x, y);
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}
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return score * w;
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}
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static const struct {
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const char *name;
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int (*process)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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} filters_def[] = {
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{"TOUT", filter_tout},
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{"VREP", filter_vrep},
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{"BRNG", filter_brng},
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{NULL}
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};
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#define DEPTH 256
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static int compute_sat_hue_metrics(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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int i, j;
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ThreadDataHueSatMetrics *td = arg;
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const SignalstatsContext *s = ctx->priv;
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const AVFrame *src = td->src;
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AVFrame *dst_sat = td->dst_sat;
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AVFrame *dst_hue = td->dst_hue;
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const int slice_start = (s->chromah * jobnr ) / nb_jobs;
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const int slice_end = (s->chromah * (jobnr+1)) / nb_jobs;
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const int lsz_u = src->linesize[1];
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const int lsz_v = src->linesize[2];
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const uint8_t *p_u = src->data[1] + slice_start * lsz_u;
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const uint8_t *p_v = src->data[2] + slice_start * lsz_v;
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const int lsz_sat = dst_sat->linesize[0];
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const int lsz_hue = dst_hue->linesize[0];
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uint8_t *p_sat = dst_sat->data[0] + slice_start * lsz_sat;
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uint8_t *p_hue = dst_hue->data[0] + slice_start * lsz_hue;
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for (j = slice_start; j < slice_end; j++) {
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for (i = 0; i < s->chromaw; i++) {
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const int yuvu = p_u[i];
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const int yuvv = p_v[i];
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p_sat[i] = hypot(yuvu - 128, yuvv - 128); // int or round?
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((int16_t*)p_hue)[i] = floor((180 / M_PI) * atan2f(yuvu-128, yuvv-128) + 180);
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}
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p_u += lsz_u;
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p_v += lsz_v;
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p_sat += lsz_sat;
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p_hue += lsz_hue;
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}
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return 0;
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}
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static int filter_frame(AVFilterLink *link, AVFrame *in)
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{
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AVFilterContext *ctx = link->dst;
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SignalstatsContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out = in;
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int i, j;
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int w = 0, cw = 0, // in
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pw = 0, cpw = 0; // prev
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int fil;
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char metabuf[128];
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unsigned int histy[DEPTH] = {0},
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histu[DEPTH] = {0},
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histv[DEPTH] = {0},
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histhue[360] = {0},
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histsat[DEPTH] = {0}; // limited to 8 bit data.
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int miny = -1, minu = -1, minv = -1;
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int maxy = -1, maxu = -1, maxv = -1;
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int lowy = -1, lowu = -1, lowv = -1;
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int highy = -1, highu = -1, highv = -1;
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int minsat = -1, maxsat = -1, lowsat = -1, highsat = -1;
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int lowp, highp, clowp, chighp;
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int accy, accu, accv;
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int accsat, acchue = 0;
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int medhue, maxhue;
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int toty = 0, totu = 0, totv = 0, totsat=0;
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int tothue = 0;
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int dify = 0, difu = 0, difv = 0;
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int filtot[FILT_NUMB] = {0};
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AVFrame *prev;
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AVFrame *sat = s->frame_sat;
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AVFrame *hue = s->frame_hue;
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const uint8_t *p_sat = sat->data[0];
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const uint8_t *p_hue = hue->data[0];
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const int lsz_sat = sat->linesize[0];
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const int lsz_hue = hue->linesize[0];
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ThreadDataHueSatMetrics td_huesat = {
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.src = in,
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.dst_sat = sat,
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.dst_hue = hue,
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};
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if (!s->frame_prev)
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s->frame_prev = av_frame_clone(in);
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prev = s->frame_prev;
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if (s->outfilter != FILTER_NONE) {
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out = av_frame_clone(in);
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av_frame_make_writable(out);
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}
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ctx->internal->execute(ctx, compute_sat_hue_metrics, &td_huesat,
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NULL, FFMIN(s->chromah, ctx->graph->nb_threads));
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// Calculate luma histogram and difference with previous frame or field.
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for (j = 0; j < link->h; j++) {
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for (i = 0; i < link->w; i++) {
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const int yuv = in->data[0][w + i];
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histy[yuv]++;
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dify += abs(yuv - prev->data[0][pw + i]);
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}
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w += in->linesize[0];
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pw += prev->linesize[0];
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}
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// Calculate chroma histogram and difference with previous frame or field.
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for (j = 0; j < s->chromah; j++) {
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for (i = 0; i < s->chromaw; i++) {
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const int yuvu = in->data[1][cw+i];
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const int yuvv = in->data[2][cw+i];
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histu[yuvu]++;
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difu += abs(yuvu - prev->data[1][cpw+i]);
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histv[yuvv]++;
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difv += abs(yuvv - prev->data[2][cpw+i]);
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histsat[p_sat[i]]++;
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histhue[((int16_t*)p_hue)[i]]++;
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}
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cw += in->linesize[1];
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cpw += prev->linesize[1];
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p_sat += lsz_sat;
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p_hue += lsz_hue;
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}
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for (fil = 0; fil < FILT_NUMB; fil ++) {
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if (s->filters & 1<<fil) {
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ThreadData td = {
|
|
.in = in,
|
|
.out = out != in && s->outfilter == fil ? out : NULL,
|
|
};
|
|
memset(s->jobs_rets, 0, s->nb_jobs * sizeof(*s->jobs_rets));
|
|
ctx->internal->execute(ctx, filters_def[fil].process,
|
|
&td, s->jobs_rets, s->nb_jobs);
|
|
for (i = 0; i < s->nb_jobs; i++)
|
|
filtot[fil] += s->jobs_rets[i];
|
|
}
|
|
}
|
|
|
|
// find low / high based on histogram percentile
|
|
// these only need to be calculated once.
|
|
|
|
lowp = lrint(s->fs * 10 / 100.);
|
|
highp = lrint(s->fs * 90 / 100.);
|
|
clowp = lrint(s->cfs * 10 / 100.);
|
|
chighp = lrint(s->cfs * 90 / 100.);
|
|
|
|
accy = accu = accv = accsat = 0;
|
|
for (fil = 0; fil < DEPTH; fil++) {
|
|
if (miny < 0 && histy[fil]) miny = fil;
|
|
if (minu < 0 && histu[fil]) minu = fil;
|
|
if (minv < 0 && histv[fil]) minv = fil;
|
|
if (minsat < 0 && histsat[fil]) minsat = fil;
|
|
|
|
if (histy[fil]) maxy = fil;
|
|
if (histu[fil]) maxu = fil;
|
|
if (histv[fil]) maxv = fil;
|
|
if (histsat[fil]) maxsat = fil;
|
|
|
|
toty += histy[fil] * fil;
|
|
totu += histu[fil] * fil;
|
|
totv += histv[fil] * fil;
|
|
totsat += histsat[fil] * fil;
|
|
|
|
accy += histy[fil];
|
|
accu += histu[fil];
|
|
accv += histv[fil];
|
|
accsat += histsat[fil];
|
|
|
|
if (lowy == -1 && accy >= lowp) lowy = fil;
|
|
if (lowu == -1 && accu >= clowp) lowu = fil;
|
|
if (lowv == -1 && accv >= clowp) lowv = fil;
|
|
if (lowsat == -1 && accsat >= clowp) lowsat = fil;
|
|
|
|
if (highy == -1 && accy >= highp) highy = fil;
|
|
if (highu == -1 && accu >= chighp) highu = fil;
|
|
if (highv == -1 && accv >= chighp) highv = fil;
|
|
if (highsat == -1 && accsat >= chighp) highsat = fil;
|
|
}
|
|
|
|
maxhue = histhue[0];
|
|
medhue = -1;
|
|
for (fil = 0; fil < 360; fil++) {
|
|
tothue += histhue[fil] * fil;
|
|
acchue += histhue[fil];
|
|
|
|
if (medhue == -1 && acchue > s->cfs / 2)
|
|
medhue = fil;
|
|
if (histhue[fil] > maxhue) {
|
|
maxhue = histhue[fil];
|
|
}
|
|
}
|
|
|
|
av_frame_free(&s->frame_prev);
|
|
s->frame_prev = av_frame_clone(in);
|
|
|
|
#define SET_META(key, fmt, val) do { \
|
|
snprintf(metabuf, sizeof(metabuf), fmt, val); \
|
|
av_dict_set(&out->metadata, "lavfi.signalstats." key, metabuf, 0); \
|
|
} while (0)
|
|
|
|
SET_META("YMIN", "%d", miny);
|
|
SET_META("YLOW", "%d", lowy);
|
|
SET_META("YAVG", "%g", 1.0 * toty / s->fs);
|
|
SET_META("YHIGH", "%d", highy);
|
|
SET_META("YMAX", "%d", maxy);
|
|
|
|
SET_META("UMIN", "%d", minu);
|
|
SET_META("ULOW", "%d", lowu);
|
|
SET_META("UAVG", "%g", 1.0 * totu / s->cfs);
|
|
SET_META("UHIGH", "%d", highu);
|
|
SET_META("UMAX", "%d", maxu);
|
|
|
|
SET_META("VMIN", "%d", minv);
|
|
SET_META("VLOW", "%d", lowv);
|
|
SET_META("VAVG", "%g", 1.0 * totv / s->cfs);
|
|
SET_META("VHIGH", "%d", highv);
|
|
SET_META("VMAX", "%d", maxv);
|
|
|
|
SET_META("SATMIN", "%d", minsat);
|
|
SET_META("SATLOW", "%d", lowsat);
|
|
SET_META("SATAVG", "%g", 1.0 * totsat / s->cfs);
|
|
SET_META("SATHIGH", "%d", highsat);
|
|
SET_META("SATMAX", "%d", maxsat);
|
|
|
|
SET_META("HUEMED", "%d", medhue);
|
|
SET_META("HUEAVG", "%g", 1.0 * tothue / s->cfs);
|
|
|
|
SET_META("YDIF", "%g", 1.0 * dify / s->fs);
|
|
SET_META("UDIF", "%g", 1.0 * difu / s->cfs);
|
|
SET_META("VDIF", "%g", 1.0 * difv / s->cfs);
|
|
|
|
for (fil = 0; fil < FILT_NUMB; fil ++) {
|
|
if (s->filters & 1<<fil) {
|
|
char metaname[128];
|
|
snprintf(metabuf, sizeof(metabuf), "%g", 1.0 * filtot[fil] / s->fs);
|
|
snprintf(metaname, sizeof(metaname), "lavfi.signalstats.%s", filters_def[fil].name);
|
|
av_dict_set(&out->metadata, metaname, metabuf, 0);
|
|
}
|
|
}
|
|
|
|
if (in != out)
|
|
av_frame_free(&in);
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static const AVFilterPad signalstats_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad signalstats_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.config_props = config_props,
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_vf_signalstats = {
|
|
.name = "signalstats",
|
|
.description = "Generate statistics from video analysis.",
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
.priv_size = sizeof(SignalstatsContext),
|
|
.inputs = signalstats_inputs,
|
|
.outputs = signalstats_outputs,
|
|
.priv_class = &signalstats_class,
|
|
.flags = AVFILTER_FLAG_SLICE_THREADS,
|
|
};
|